Which two statements about MAB are true? (Choose two.)
A . It requires a preexisting database of the MAC addresses of permitted devices.
B . It is unable to control network access at the edge.
C . If MAB fails, the device is unable to fall back to another authentication method.
D . It is unable to link the IP and MAC addresses of a device.
E . It is unable to authenticate individual users.
Answer: A, E